Fundamental Measurements and Modeling of Prescribed Fire Behavior in the Naturally Heterogeneous Fuel Beds of Southern Pine Forests
Abstract
This study examined aspects of pyrolysis to improve the understanding and modeling capability of pyrolysis in physics-based fire spread models. Measurements of pyrolysis gases from foliar fuels at bench, wind-tunnel and field scale showed that convective and radiative heat transfer from flames to live fuel particles influenced pyrolysis composition. Pyrolysis gas composition differed at laboratory and field scales. Dynamic changes in gas composition measured by FTIR were correlated with fire phase determined by IR camera. High-fidelity physics-based modeling. Replacement of an Arrhenius-based model with an equilibrium model for evaporation in the GPyro model resulted in fuel drying dynamics more consistent with evaporation physics. Convective heating seemed to have a greater impact on pyrolysis and burning of an individual leaf compared to radiative heating.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 27, 2021
- Accession Number
- AD1180629
Entities
People
- Akira Kato
- Andrew T. Hudak
- Babak Shotorban
- Benjamin C Bright
- Bret Butler
- Charles R. Boardman
- David R Weise
- E. L. Loudermilk
- Joseph C Restaino
- Joseph J. O'Brien
- Mark A. Dietenberger
- Marko Princevac
- Roger D. Ottmar
- Sara Mcallister
- Shankar Mahalingam
- Stephen P Baker
- Tanya L Myers
- Thomas H Fletcher
- Timothy J Johnson
- Weimin Hao
- William E Mell
Organizations
- Brigham Young University
- Chiba University
- Pacific Northwest National Laboratory
- Pacific Northwest Research Station
- University of Alabama in Huntsville
- University of California, Riverside